Stolin-R Paste

Get scaling polishing done by a dentist than brush twice daily especially at night massage gums use any std tooth paste.

I think you have periodontitis cleaning (scaling) your teeth by dentist then use snowdent toothpaste for teeth whitening use mouthwash for maintent your oral hygiene.

you should get braces to cure problem permanently or slowly the gum in between teeth will get necrosed

Sensodyne tooth paste, with warm saline rinses. Basically brushing technique matters. Else can demonstrate you at my clinic.

For cavity problems, the toothpaste you mentioned will not reduce the risk of cavity problems for not decaying if you have acute carious activity in your mouth. For that 1. If you do not have fluorosis then 3m clinpro 5000 1.1% toothpaste (its expensive than the other toothpaste available in the market) or enafix toothpaste. Reduces risk for cavity and make enamel strong also 1. Correct brushing technique 2. Flossing daily 3. Use of mouthwash like chlorhexidine, hydrogen peroxide, or betadine or saltwater rinses 4. Use of interdental brushes 5. Gum paints like stolin. Metrohex plus gel. 6. Fluoride application every 6 months through a nearby dentist 7. Tell your dentist to take 5 x-rays (upper/ lower right and left back teeth from canine to last molar) of your every 6 months and keep a track of caries activity. 8. Brushing at night is super important, no matter what you eat or drink 9. Restrict eating toffee/ chocolate/ milk/soda/pizza/burger/chewing gum/or any food or drink in between your meal. 10. Stop habits like drinking coke, lime, any fizzy drinks, tobacco, paan, smoke, and similar. You need to reduce the bacterial load in your mouth, as soon as you do it you will see change. Get your fillings complete before its reaches deep. Also yellow teeth could me many reasons top most are 1. You might take some medication. 2. You are not brushing at night / in morning / or using datun or using red paste. 3. Genetically 4. Water in your area there are many other reasons for whitening your teeth some toothpaste availabe - glizer Dr. Reddy -colgate white sparkle /visible white teeth whitening chemical is kept less in toothpaste, you might see results with these toothpaste if you brush with them for three times a day. Regular use of such toothpaste can make your teeth sensitive to hot and cold, can also abrade your teeth, also such toothpaste don't give the desired results and long lasting results. Benefits are, it is handy, with less chemical use you can get pretty ok looking glowy teeth. But extreme results are more in in office dental whitening some mouthwash available -hydrogen peroxide mouthwash 3: 1 some home whitening kit availabe (for this you need to visit dentist) also most effective is in office teeth whitening (dentist visit) send some pictures for more detail answers.